- Category:
- Jsp/Servlet
- Tags:
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[Text]
- File Size:
- 4kb
- Update:
- 2013-01-17
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- Uploaded by:
- hsm
Description: Login often coupled with verification code, and then submit the form validation to the action, however, this practice often authentication fails, return to the INPUT page, the picture does not show the verification code, and throws the empty pointer exception, in which case, the usual solution is to jump to the action page defined as redirect input page of, so the picture does not show the problem can be solved, and not throw an exception, but the validation error message text box to enter information but will not be displayed on the return to the page, the only problem I encountered in practice, of course, the traditional approach is likely to also bring a lot of a wide range of issues, the use of AJAX solve the above problems, Here is a simple login page authentication processes: images.jsp,
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